Rotary operation member and sound control device

Abstract

A rotary operation member (2) is provided with: a shaft part (5) that is rotated about a rotation axis (Rx1); a first rotary body (82) that rotates together with the shaft part; a second rotary body (83) having a second surface (83A) that is in surface contact with a first surface (82B) of the first rotary body; a rotary damper (7) connected to the second rotary body; and a pressing part (81) that presses the first rotary body against the second rotary body.

Description

Rotary control device and sound control device

[0001] The present invention relates to a rotary operator and an audio control device.

[0002] Conventionally, an audio device equipped with a rotary operator has been known (see, for example, Patent Document 1). The audio device described in Patent Document 1 includes a housing that houses a signal processing circuit and an operating device provided on the front surface of the housing. The operating device is a rotary input device used to adjust playback volume. The operating device includes a rotating shaft, an operating unit that is an operating knob provided on one end of the rotating shaft, a variable resistor provided on the other end of the rotating shaft, a first support portion, and a second support portion. The first support portion and the second support portion face each other with a gap between them, and a first bearing portion is provided in a first through-hole of the first support portion, and a second bearing portion is provided in a second through-hole of the second support portion. The rotating shaft is supported by the first bearing portion and the second bearing portion.

[0003] Japanese Patent Application Laid-Open No. 2019-109589

[0004] In the operating device described in Patent Document 1, the rotational load on the rotating shaft increases according to the rotational speed of the rotating shaft. Therefore, when rotating the rotating shaft at a low speed, the rotational load on the rotating shaft is relatively small, making it easy to rotate the rotating shaft. On the other hand, when rotating the rotating shaft at a high speed, the rotational load on the rotating shaft is relatively large, making it difficult to rotate the rotating shaft. For this reason, there has been a demand for a rotary operator that is easy to rotate both at a low speed and at a high speed.

[0005] An object of the present invention is to provide a rotary operator and an audio control device that are easy to rotate.

[0006] A rotary manipulator according to a first aspect of the present invention comprises a shaft portion that rotates around a rotation axis, a first rotating body that rotates together with the shaft portion, a second rotating body having a second surface that is in surface contact with a first surface of the first rotating body, a rotary damper that is connected to the second rotating body, and a pressing portion that presses the first rotating body against the second rotating body.

[0007] An acoustic control device according to a second aspect of the present invention includes the rotary operator according to the first aspect.

[0008] Schematic diagram showing the configuration of an audio control device according to the first embodiment. A perspective view showing a rotary operator according to the first embodiment. A perspective view showing a rotary operator according to the first embodiment. A cross-sectional view showing a rotary operator according to the first embodiment. A cross-sectional view showing a rotary operator according to the first embodiment. A perspective view showing a housing according to the first embodiment. A perspective view showing a operator main body according to the first embodiment. An exploded perspective view showing a operator main body according to the first embodiment. An exploded perspective view showing a operator main body according to the first embodiment. An exploded perspective view showing a press portion according to the first embodiment. An exploded perspective view showing a press portion according to the first embodiment. A graph showing the rotation speed and rotation load of a shaft part according to the first embodiment. A perspective view showing an adjustment mechanism according to the first embodiment. A graph showing the rotation speed and rotation load of a shaft part according to the first embodiment. A schematic diagram showing the configuration of a crossfader according to a second embodiment.

[0009] [First Embodiment] A first embodiment of the present invention will now be described with reference to the drawings. [Configuration of Acoustic Control Device] FIG. 1 is a schematic diagram showing the configuration of an acoustic control device 1 according to this embodiment. The acoustic control device 1 according to this embodiment mixes multiple pieces of music. Specifically, the acoustic control device 1 mixes a first piece of music loaded to a first channel and a second piece of music loaded to a second channel, and outputs an audio signal corresponding to the mixed music. As will be described in detail later, one of the features of the acoustic control device 1 is that it has a normal mode in which the first piece of music and the second piece of music are mixed in response to operations on the controls, and an assist mode in which the mixing of the first piece of music and the second piece of music is assisted. As shown in FIG. 1 , the acoustic control device 1 has a housing 11, two channel operation units 12, and a crossfader 13. Although not shown in FIG. 1 , the acoustic control device 1 further includes a control unit that controls the operation of the acoustic control device 1.

[0010] [Configuration of the Housing] The housing 11 is formed in a substantially rectangular parallelepiped shape and houses the control unit inside. The housing 11 has a top surface 111, an upper surface 112, a lower surface 113, a left side surface 114, a right side surface 115, and a bottom surface (not shown). Two channel operation units 12 and a crossfader 13 are arranged on the top surface 111.

[0011] [Configuration of Channel Operation Unit] The two channel operation units 12 operate the playback state of music loaded on the corresponding channels. The two channel operation units 12 are a first channel operation unit 12A that operates the playback state of a first music piece loaded on a first channel, and a second channel operation unit 12B that operates the playback state of a second music piece loaded on a second channel. Each channel operation unit 12A, 12B has a jog dial 121, an equalizer adjustment unit 122, a channel fader 123, and a tempo slider 124.

[0012] The jog dial 121 is rotatably provided on the top surface 111 and is a dial used to adjust the playback direction and playback speed of a song that is being played. Note that the user can perform a scratch operation that is unique to DJ performances by combining changes in the rotation direction and rotation speed of the jog dial 121.

[0013] The equalizer adjustment units 122 perform equalizer adjustment processing for the corresponding channels. Specifically, the equalizer adjustment unit 122 of the first channel operation unit 12A performs equalizer adjustment processing for the first channel, and the equalizer adjustment unit 122 of the second channel operation unit 12B performs equalizer adjustment processing for the second channel. Each equalizer adjustment unit 122 includes a level adjustment unit 1221, a high-frequency band adjustment unit 1222, a mid-frequency band adjustment unit 1223, a low-frequency band adjustment unit 1224, and an effect adjustment unit 1225. At least one of the level adjustment unit 1221, the high-frequency band adjustment unit 1222, the mid-frequency band adjustment unit 1223, the low-frequency band adjustment unit 1224, and the effect adjustment unit 1225 is configured by a rotary operator 2, which will be described later.

[0014] The level adjustment unit 1221 adjusts the input level of the input music. The high-frequency band adjustment unit 1222 adjusts the volume level of the high-frequency band of the input music. The high-frequency band is, for example, a frequency band of 4649 Hz or higher. The mid-frequency band adjustment unit 1223 adjusts the volume level of the mid-frequency band of the input music. The mid-frequency band is, for example, a frequency band above 284 Hz and below 4649 Hz. The low-frequency band adjustment unit 1224 adjusts the maximum volume level of the low-frequency band of the input music. The low-frequency band is, for example, a frequency band of 284 Hz or lower. The effect adjustment unit 1225 is a control that adjusts the effect amount of the effect set in the corresponding channel operation unit 12.

[0015] The channel faders 123 are controls that adjust the volume of the sound output from the corresponding channel operation unit 12, and ultimately from the acoustic control device 1. Specifically, the channel fader 123 of the first channel operation unit 12A is the first channel fader 123A, which adjusts the volume of the sound output from the acoustic control device 1. The channel fader 123 of the second channel operation unit 12B is the second channel fader 123B, which adjusts the volume of the sound output from the acoustic control device 1. Each channel fader 123 has a fader operator 1231 that can slide up and down. When the fader operator 1231 is operated upward, the volume of the entire music output from the corresponding channel operation unit 12 is increased. When the fader operator 1231 is operated downward, the volume of the entire music output from the corresponding channel operation unit 12 is decreased. Note that the channel faders 123 are not limited to being configured with a slidable fader operator 1231, and may be configured with a rotary operator 2, which will be described later.

[0016] The tempo slider 124 adjusts the playback speed of a song by adjusting the BPM (Beats Per Minute) of the song loaded to the corresponding channel. The BPM of a song represents the tempo of the song, i.e., the number of beats per minute of the song. The tempo slider 124 of the first channel operation unit 12A is a first tempo slider 124A, which adjusts the BPM of the first song loaded to the first channel during playback. The tempo slider 124 of the second channel operation unit 12B is a second tempo slider 124B, which adjusts the BPM of the second song loaded to the second channel during playback. The tempo slider 124 is not limited to a configuration having a slidable slide operator, and may be configured with a rotary operator 2, which will be described later.

[0017] [Configuration of the Crossfader] The crossfader 13 has a fader operator 131 that can move left and right, and adjusts the balance between the volume of a first song loaded to the first channel and the volume of a second song loaded to the second channel. As the fader operator 131 is moved toward the first channel operation unit 12A, the proportion of the volume of the first song in the volume output from the sound control device 1 increases. As the fader operator 131 is moved toward the second channel operation unit 12B, the proportion of the volume of the second song in the volume output from the sound control device 1 increases.

[0018] [Configuration of Rotary Operator] FIGS. 2 and 3 are perspective views showing the rotary operator 2. More specifically, FIG. 2 is a perspective view showing the rotary operator 2 as viewed from above, and FIG. 3 is a perspective view showing the rotary operator 2 as viewed from below. FIG. 4 is a view showing a cross section of the rotary operator 2 along the XZ plane (described below), and FIG. 5 is a view showing a cross section of the rotary operator 2 along the YZ plane (described below). As described above, the rotary operator 2 constitutes at least one of the adjustment units 1221 to 1225. The rotary operator 2 is rotated by the user and is configured to reduce the rotational load during high-speed rotation. The rotational load can also be referred to as load torque. As shown in FIGS. 2 to 5, the rotary operator 2 includes a housing 3, an operator main body 4, and an adjustment mechanism 9.

[0019] In the following description, the three mutually orthogonal directions are referred to as the +X direction, the +Y direction, and the +Z direction. The +Z direction is a direction along the rotation axis Rx1 of the shaft portion 5 provided on the manipulator main body 4, and is a direction rising from the placement surface 311 of the base 31 that constitutes the housing 3 and moving away from the base 31. Although not shown in the drawings, the direction opposite the +X direction is referred to as the -X direction, the direction opposite the +Y direction is referred to as the -Y direction, and the direction opposite the +Z direction is referred to as the -Z direction. Furthermore, the axis along the +X direction is referred to as the X axis, the axis along the +Y direction is referred to as the Y axis, and the axis along the +Z direction is referred to as the Z axis.

[0020] [Configuration of the Housing] Fig. 6 is a perspective view showing the housing 3 as seen from above. The housing 3 is a housing in which the manipulator body 4 and the adjustment mechanism 9 are disposed. As shown in Fig. 6, the housing 3 includes a base 31, a holding member 32, a bearing 33, and a cover member 34.

[0021] [Configuration of the Base] As shown in FIG. 3 , the base 31 is a flat plate-like body. As shown in FIGS. 2 to 6 , the base 31 has an arrangement surface 311 on which the holding member 32, the manipulator main body 4, and the adjustment mechanism 9 are arranged. As shown in FIG. 6 , the arrangement surface 311 has a locking portion 312, a restricting portion 313, a boss 314, and a hole 315 provided thereon. The arrangement surface 311 is a surface of the housing 3 facing the +Z direction. The locking portion 312 locks one end of a biasing member BM1 (see FIG. 2 ) that biases a rotary damper 7 (described later) of the manipulator main body 4. The restricting portion 313 is a protrusion that protrudes in the +Z direction from the end of the arrangement surface 311 in the −Y direction. The restricting portion 313 is inserted into the rotary damper 7 from the −Z direction, thereby restricting the rotary damper 7 from rotating around a rotation axis along the Z axis.

[0022] The boss 314 is provided in approximately the center of the area of ​​the arrangement surface 311 that is covered in the +Z direction by the holding member 32, and protrudes cylindrically from the arrangement surface 311 in the +Z direction. The boss 314 is inserted into an insertion hole 921 (see FIG. 13 ) of a cam member 92, which will be described later. The hole 315 penetrates the boss 314 along the Z axis. A fitting portion 726 (see FIG. 9 ) of a rotary damper 7, which will be described later, of the manipulator body 4 is inserted into the hole 315. Furthermore, as shown in FIG. 3 , the base 31 has a hole 316 provided adjacent to the hole 315. A boss 727 of the rotary damper 7, which will be described later, is inserted into the hole 316.

[0023] [Configuration of Holding Member] The holding member 32 is disposed in the +Z direction relative to the base 31 and fixed to the base 31. The holding member 32 is configured in a box shape that is open on the base 31 side, and when combined with the base 31, it accommodates a portion of the manipulator main body 4 and the adjustment mechanism 9 between the holding member 32 and the base 31. As shown in FIG. 6 , the holding member 32 has a substantially rectangular top surface portion 321 and side surface portions 325 that extend from the periphery of the top surface portion 321 toward the base 31. The top surface portion 321 is the surface of the holding member 32 that faces the +Z direction. As shown in FIG. 3 , the tip of the side surface portion 325 is fixed to the base 31 by a screw SC1. The side surface portion 325 covers a portion of the manipulator main body 4 in the ±X and ±Y directions.

[0024] The holding member 32 has an insertion opening 322 and a support portion 323 provided in the top surface portion 321. The insertion opening 322 is a circular through-hole that penetrates the top surface portion 321 along the Z axis. A shaft portion 5 (described later) of the manipulator body 4 is inserted into the insertion opening 322. The support portion 323 is a cylindrical portion that protrudes in the −X direction from a side surface portion 325 in the −X direction. More specifically, the support portion 323 is a cylindrical portion that is provided so that its central axis is aligned with the Z axis. The support portion 323 has a hole portion 324 through which the shaft 911 of the adjustment mechanism 9 is inserted along the Z axis.

[0025] [Configuration of Bearing and Cover Member] The bearing 33 is provided on the top surface 321 in accordance with the insertion hole 322. The shaft 5 of the manipulator main body 4 is inserted into an opening 331 provided in the bearing 33. The bearing 33 is fixed to the shaft 5 by a washer (not shown). The cover member 34 is fixed to the top surface 321 by a screw SC2 so as to cover a part of the top surface 321 and the bearing 33 in the +Z direction. The cover member 34 is connected to the outer peripheral surface of the bearing 33. This allows the shaft 5 to be rotatably supported on the housing 3. The cover member 34 has an opening 341 that penetrates the cover member 34 along the Z axis. The shaft 51 of the shaft 5 is inserted into the openings 331, 341 along the -Z direction.

[0026] [Configuration of the Manipulator Body] Fig. 7 is a perspective view showing the manipulator body 4 as viewed from the +Z direction. Fig. 8 is an exploded perspective view showing the manipulator body 4 as viewed from the +Z direction, and Fig. 9 is an exploded perspective view showing the manipulator body 4 as viewed from the -Z direction. The manipulator body 4 is a manipulator that detects a rotation operation by the user. More specifically, the manipulator body 4 detects the rotation angle of the shaft portion 5 that is rotated by the user. As shown in Figs. 7 to 9, the manipulator body 4 includes the shaft portion 5, a detection unit 6, a rotation damper 7, and a rotation transmission mechanism 8.

[0027] [Configuration of Shaft] The shaft 5 is mounted on the housing 3 rotatably around a rotation axis along the Z axis via the bearing 33 described above, and receives rotational operation by the user. The shaft 5 has a shaft 51 shown in FIGS. 8 and 9 , as well as an operation knob 52 shown in FIGS. 7 to 9 . As shown in FIGS. 8 and 9 , the shaft 51 is a substantially cylindrical rod-shaped member disposed along the Z axis. The shaft 51 is inserted into the bearing 33 described above. The bearing 33 is disposed approximately at the center of the shaft 51 along the Z axis. The operation knob 52 is fixed to an end 511 of the shaft 51 facing the +Z direction. The end 512 of the shaft 51 facing the −Z direction has an insertion portion 513 and a protrusion 514. The insertion portion 513 is formed in a substantially rectangular prism shape. The insertion portion 513 is inserted through a detection unit main body 62 (described later) of the detection unit 6, and then inserted into the pressing portion 81 of the rotation transmission mechanism 8. The protrusion 514 protrudes in a cylindrical shape in the -Z direction from the -Z direction end of the insertion portion 513. The protrusion 514 is inserted into a holding member 84 (described later) of the rotation transmission mechanism 8. The operation knob 52 has an outer diameter larger than the outer diameter of the shaft 51, which is centered on the rotation axis Rx1. The operation knob 52 is the part of the operation unit body 4 that is gripped by the user, and when the operation knob 52 is rotated about the rotation axis Rx1, the shaft 51, and therefore the shaft portion 5, rotates about the rotation axis Rx1.

[0028] [Configuration of the Detector] The detector 6 detects the rotation of the shaft 5. Specifically, the detector 6 detects the rotation angle of the rotated shaft 5. The detector 6 includes a fixed member 61 and a detector main body 62. The fixed member 61 is a flat plate-shaped member and is fixed to the surface of the top surface 321 of the housing 3 facing the −Z direction with screws SC3. The detector main body 62 is disposed on an arrangement surface 611 of the fixed member 61 facing the +Z direction. The detector main body 62 has an insertion hole 621 through which the shaft 51 of the shaft 5 is inserted along the Z axis. In this embodiment, the detector main body 62 is a variable resistor (potentiometer) whose output voltage changes in response to the user's rotation of the shaft 5. A control unit (not shown) of the acoustic control device 1 obtains the rotation angle of the shaft 5 based on the output voltage from the detector main body 62. However, the present invention is not limited to this, and the detection unit main body 62 may be a rotary encoder having a rotating unit that rotates together with the shaft unit 5 and a sensor that detects the rotation angle of the rotating unit.

[0029] [Configuration of the Rotational Damper] The rotational damper 7 is a viscous resistance type rotational damper that applies a braking force generated by the viscous resistance of oil to the rotation of the shaft portion 5 transmitted via the rotation transmission mechanism 8, thereby providing resistance to the rotation of the shaft portion 5. As shown in FIGS. 8 and 9 , the rotational damper 7 includes a rotating member 71 and a container 72. The rotating member 71 is disposed within the container 72 such that a portion of the rotating member 71 protrudes from the container 72 in the +Z direction. The rotating member 71 is inserted into a holding member 84 (described later) of the rotation transmission mechanism 8, and is rotated together with the holding member 84 about the rotation axis Rx1.

[0030] The container 72 supports the rotating member 71 so that it can rotate about the rotation axis Rx1. Although not shown, viscous oil such as silicone oil is sealed inside the container 72, and the viscous oil provides resistance when the rotating member 71 rotates. In such a rotary damper 7, the rotational torque changes depending on the rotational speed of the rotating member 71. For example, when the rotational speed of the rotating member 71 is high, the rotational torque of the rotating member 71 increases, and when the rotational speed of the rotating member 71 is low, the rotational torque of the rotating member 71 decreases. This changes the rotational torque of the shaft portion 5, which is connected to the rotating member 71 via the rotation transmission mechanism 8.

[0031] The container 72 has a surface 721 facing the +Z direction, a surface 722 facing the -Z direction, and a side surface 723 connecting the surfaces 721 and 722. In addition, the container 72 has a locking portion 724 and a recessed portion 725, as shown in Figures 7 and 8. The locking portion 724 is provided on one of the side surfaces 723 facing the -X direction. The locking portion 724 is formed in a hook shape and locks with one end of the biasing member BM1, the other end of which is locked with the locking portion 312 of the base 31. The recessed portion 725 is provided on one of the side surfaces 723 facing the -Y direction, and is open in the -Z and -Y directions. As described above, the regulating portion 313 (see Figure 2) of the base 31 of the housing 3 is inserted into the recess 725, thereby regulating the rotation of the container 72 around the rotation axis Rx1, and ultimately the rotation of the rotary damper 7.

[0032] As shown in FIG. 9 , the container 72 further includes a fitting portion 726, a boss 727, and a groove 728. The fitting portion 726 is a cylindrical portion disposed at the center of the container 72 when viewed from the −Z direction and protruding in the −Z direction. A cam member 92, one of the components of the adjustment mechanism 9 described below, disposed in the −Z direction relative to the rotary damper 7, is inserted along the Z axis into the fitting portion 726 and inserted into a hole 315 of the base 31 (see FIGS. 4 and 5 ). The boss 727 is disposed on the outer periphery of the container 72 relative to the fitting portion 726 when viewed from the −Z direction and protrudes in the −Z direction. The cam member 92 is inserted along the Z axis into the hole 316 of the base 31. After load adjustment is performed by the adjustment mechanism 9 described below, the boss 727 can be fixed to the base 31 with a screw SC4. This fixes the rotary damper 7 to the base 31, eliminating the need for the biasing member BM1.

[0033] Groove 728 is provided on surface 722 facing the -Z direction. Groove 728 is a spiral groove centered on rotation axis Rx1 and recessed from surface 722 in the +Z direction. More specifically, groove 728 is divided into three regions 7281, 7282, and 7283 at equal intervals along the circumferential direction centered on the rotation axis of rotating member 71. In each of regions 7281 to 7283, the amount of recession from surface 721 in the +Z direction increases counterclockwise when viewed from the -Z direction. An end face cam portion 924 of cam member 92 is inserted into groove 728. As will be described in more detail below, when cam member 92 rotates around rotation axis Rx1, rotary damper 7, whose rotation is restricted by restricting portion 313, is moved in the +Z direction or the -Z direction.

[0034] [Configuration of the Rotation Transmission Mechanism] As shown in FIGS. 4 to 8 , the rotation transmission mechanism 8 is disposed between the detection unit 6 and the rotary damper 7 on the Z axis. The rotation transmission mechanism 8 connects the shaft 51 of the shaft unit 5 to the rotary damper 7 and transmits the rotation of the shaft unit 5 to the rotary damper 7. Furthermore, the rotation transmission mechanism 8 switches the state of transmission of rotation from the shaft unit 5 to the rotary damper 7 to change the rotational load on the shaft 51. Specifically, the rotation transmission mechanism 8 switches between a state in which the rotation of the shaft unit 5 is transmitted to the rotary damper 7 and the rotational load from the rotary damper 7 acts on the shaft unit 5, and a state in which the rotation of the shaft unit 5 is not transmitted to the rotary damper 7 and the rotational load from the rotary damper 7 does not act on the shaft unit 5. The rotation transmission mechanism 8 includes a pressing unit 81, a first rotating body 82, a second rotating body 83, and a holding member 84.

[0035] [General Configuration of Pressing Unit] The pressing unit 81 presses one of the first rotating body 82 and the second rotating body 83 toward the other rotating body. In this embodiment, the pressing unit 81 is disposed between the first rotating body 82 and the detection unit 6 on the Z axis, and presses the first rotating body 82 toward the second rotating body 83. The configuration of the pressing unit 81 will be described in detail later.

[0036] [Configuration of First Rotating Body] The first rotating body 82 is disposed perpendicular to the rotation axis Rx1, and rotates together with the pressing portion 81 connected to the shaft 51 of the shaft portion 5. That is, the first rotating body 82 rotates together with the shaft portion 5 about the rotation axis Rx1. In this embodiment, the first rotating body 82 is a disk-shaped member, and a circular opening 821 is formed at the center of the first rotating body 82 when viewed from the +Z direction, through which an insertion portion 841 of the holding member 84 is inserted from the -Z direction.

[0037] An adhesive tape 85 is provided on a surface 82A of the first rotating body 82 facing the pressing portion 81 in the +Z direction. The adhesive tape 85 bonds the first rotating body 82 and the pressing portion 81 together, causing the first rotating body 82 to rotate together with the pressing portion 81. In other words, the first rotating body 82 is provided integrally with the pressing portion 81. Note that the surface 82A of the first rotating body 82 and the surface of the pressing portion 81 facing the -Z direction may be fixed to each other by adhesive or the like. In this case, the adhesive tape 85 can be omitted. A surface 82B of the first rotating body 82 facing the second rotating body 83 corresponds to the first surface and is frictionally bonded to a surface 83A of the second rotating body 83 facing the +Z direction. The surface 82B is perpendicular to the rotation axis Rx1.

[0038] [Configuration of the Second Rotating Body] The second rotating body 83 is disposed perpendicular to the rotation axis Rx1 and facing the first rotating body 82. In this embodiment, the second rotating body 83 is a disk-shaped member. As shown in FIG. 8 , a circular opening 831 is formed at the center of the second rotating body 83 when viewed from the +Z direction, through which the insertion portion 841 of the holding member 84 is inserted from the -Z direction. The second rotating body 83 is frictionally joined to the first rotating body 82 at a surface 83A in the +Z direction that faces the first rotating body 82. The surface 83A corresponds to the second surface and is perpendicular to the rotation axis Rx1. Therefore, when the first rotating body 82 rotates at a low speed, the second rotating body 83 rotates integrally with the first rotating body 82 around the rotation axis Rx1. On the other hand, when the first rotating body 82 rotates at a high speed and the load torque of the rotary damper 7 increases and exceeds the friction torque, the first rotating body 82 slides relative to the second rotating body 83. In this case, the second rotating body 83 does not follow the rotation of the first rotating body 82 and does not rotate integrally with the first rotating body 82 .

[0039] [Configuration of Holding Member] The holding member 84 is formed in a disk shape when viewed from the +Z direction. The holding member 84 houses and holds the first rotating body 82 and the second rotating body 83, and rotates integrally with the second rotating body 83 about the rotation axis Rx1. That is, the first rotating body 82 and the second rotating body 83 are disposed between the pressing portion 81 and the holding member 84 on the Z axis. In this embodiment, the outer diameter of the holding member 84 centered on the rotation axis Rx1 is larger than the outer diameter of the pressing portion 81 centered on the rotation axis Rx1. However, this is not limited thereto, and the outer diameter of the holding member 84 may be the same as the outer diameter of the pressing portion 81 or may be smaller than the outer diameter of the pressing portion 81.

[0040] As shown in FIG. 8 , the holding member 84 has an insertion portion 841 and a recess 842. The insertion portion 841 is a cylindrical portion that protrudes in the +Z direction from the center of the holding member 84 when viewed from the +Z direction. The insertion portion 841 is inserted from the −Z direction through the opening 831 of the second rotating body 83 and the opening 821 of the first rotating body 82, and is inserted into an insertion hole 8123 (described later) of the pressing portion 81. However, as shown in FIGS. 4 and 5 , gaps are provided between the outer circumferential surface of the insertion portion 841 and the inner edge of the opening 821 of the first rotating body 82, and between the outer circumferential surface of the insertion portion 841 and the inner surface of the insertion hole 8123. For this reason, the pressing portion 81 and the holding member 84 do not come into contact with each other.

[0041] As shown in FIG. 8 , the recess 842 is provided on the outside of the insertion portion 841 when viewed from the +Z direction, and is recessed in the −Z direction. The first rotating body 82 and the second rotating body 83 are disposed within the recess 842. An adhesive tape 86 similar to the adhesive tape 85 is provided on the bottom 843 of the recess 842, and the adhesive tape 86 bonds the second rotating body 83 to the bottom 843. This integrates the second rotating body 83 and the holding member 84, and the holding member 84 rotates integrally with the second rotating body 83. Note that the −Z direction surface of the second rotating body 83 and the bottom 843 may be fixed to each other by adhesive or the like. In this case, the adhesive tape 86 can be omitted.

[0042] 9, the holding member 84 has a recess 844 provided in the center of the holding member 84 when viewed from the -Z direction. The recess 844 is formed in a semicircular shape when viewed from the -Z direction, and the rotating member 71 of the rotary damper 7 fits into the recess 844 from the -Z direction. This causes the rotating member 71 to rotate integrally with the holding member 84 around the rotation axis Rx1.

[0043] [Configuration of Pressing Unit] Fig. 10 is an exploded perspective view showing the pressing unit 81 as viewed from the +Z direction, and Fig. 11 is an exploded perspective view showing the pressing unit 81 as viewed from the -Z direction. As described above, the pressing unit 81 presses the first rotating body 82 toward the second rotating body 83. As shown in Figs. 10 and 11 , the pressing unit 81 has a first case 811, a second case 812, a first biasing member 813, and a second biasing member 814. The first case 811 and the second case 812 are fixed together by a plurality of screws SC5 that are inserted through the first case 811 along the Z axis and fixed to the second case 812.

[0044] [Configuration of First Case] ​​The first case 811 is formed in a substantially circular shape when viewed from the +Z direction and is disposed in the +Z direction relative to the second case 812. As shown in FIG. 10 , the first case 811 has an insertion hole 8111, a two-step hole 8112, a notch 8113, and a locking portion 8114. The insertion hole 8111 is provided in the center of the first case 811 when viewed from the +Z direction and penetrates the first case 811 along the Z axis. The insertion portion 513 is inserted into the insertion hole 8111. A plurality of two-step holes 8112 are provided at substantially equal intervals in the circumferential direction centered on the rotation axis Rx1. The two-step holes 8112 penetrate the first case 811 along the Z axis, and a screw SC5 that fastens the first case 811 and the second case 812 is inserted into each two-step hole 8112.

[0045] The notch 8113 is provided in a portion in the +X direction and the -Y direction when the first case 811 is viewed from the +Z direction. The notch 8113 is a portion for avoiding the second biasing member 814 arranged in the second case 812 when the first case 811 and the second case 812 are combined. The locking portion 8114 is provided in a position clockwise from the notch 8113 when the first case 811 is viewed from the +Z direction. The locking portion 8114 is formed in a hook shape and locks one end of the second biasing member 814.

[0046] As shown in FIG. 11 , the first case 811 further has a boss 8115 located in the center of the first case 811 when viewed from the -Z direction, and a fitting portion 8116. The boss 8115 protrudes in the -Z direction from the -Z direction surface of the first case 811, and the insertion opening 8111 described above penetrates the boss 8115 along the Z axis. The boss 8115 is a portion that ensures the strength of the first case 811 against the shaft portion 5 that rotates with the insertion portion 513 inserted in the insertion opening 8111. The fitting portion 8116 is a protruding portion that opens in the -Z direction. The insertion portion 8128 of the second case 812 is inserted into the fitting portion 8116.

[0047] [Configuration of Second Case] ​​The second case 812 is combined with the first case 811 by the screw SC4 described above. The second case 812 is formed in a circular shape when viewed from the +Z direction. The second case 812 has a peripheral wall 8121, a cylindrical portion 8122, an insertion hole 8123, a recess 8124, a boss 8125, a screw hole 8126, a locking portion 8127, and an insertion portion 8128. The surface of the second case 812 facing the -Z direction is a connection surface 8129 that is connected to the first rotating body 82 via adhesive tape 85.

[0048] The peripheral wall 8121 is a portion that protrudes in the +Z direction from the outer periphery of the second case 812 when viewed from the +Z direction. The cylindrical portion 8122 is a cylindrical portion that protrudes in the +Z direction from the center of the second case 812 when viewed from the +Z direction. The cylindrical portion 8122 is provided with a substantially circular insertion hole 8123 that penetrates the second case 812 along the Z axis. The protruding portion 514 of the shaft 51, whose insertion portion 513 is inserted into the insertion hole 8111 of the first case 811, is inserted into the insertion hole 8123. The recess 8124 is located inside the peripheral wall 8121 and outside the cylindrical portion 8122 when viewed from the +Z direction, and is a portion that is recessed in the -Z direction from the peripheral wall 8121. A plurality of bosses 8125 and a locking portion 8127 protrude from the bottom of the recess 8124.

[0049] The multiple bosses 8125 are provided at approximately equal intervals along the circumferential direction centered on the cylindrical portion 8122 when viewed from the +Z direction. In this embodiment, four bosses 8125 are provided. Each boss 8125 protrudes in the +Z direction from the bottom of the recess 8124, and a first biasing member 813 is disposed in each boss 8125. A screw hole 8126 is formed in the +Z direction surface of each boss 8125, and a screw SC5 inserted through the two-step hole 8112 is fixed in the screw hole 8126. The locking portion 8127 is provided in a hook shape at a position in the +X direction and the -Y direction on the bottom of the recess 8124. The locking portion 8127 locks the other end of the second biasing member 814, one end of which is locked to the locking portion 8114 of the first case 811. When the first case 811 and the second case 812 are combined, the insertion portion 8128 is inserted into the fitting portion 8116 of the first case 811. This prevents one of the first case 811 and the second case 812 from rotating relative to the other case about the rotation axis Rx1.

[0050] [Configuration of First Biasing Member] The first biasing member 813 corresponds to the biasing member of the present invention. A plurality of first biasing members 813 are attached to each boss 8125 and arranged in the circumferential direction about the rotation axis Rx1. The first biasing member 813 biases the second case 812, which is in contact with the first rotating body 82, in the −Z direction relative to the first case 811, thereby pressing the first rotating body 82 toward the second rotating body 83. In this embodiment, the first biasing member 813 is formed by a compression coil spring. However, the first biasing member 813 is not limited to this. The first biasing member 813 may be formed by an elastic body that elastically deforms to bias the second case 812 in the −Z direction relative to the first case 811, or may be formed by another spring member such as a leaf spring. Furthermore, the first biasing member 813 does not have to be arranged in the circumferential direction about the rotation axis Rx1. For example, the first biasing member 813 may be a single coil spring or a single ring-shaped elastic member that surrounds the cylindrical portion 8122 when viewed along the rotation axis Rx1.

[0051] [Configuration of the Second Biasing Member] The second biasing member 814 is engaged with the locking portion 8114 of the first case 811 and the locking portion 8127 of the second case 812. The second biasing member 814 biases the second case 812 in a direction in which the locking portion 8127 approaches the locking portion 8114. That is, the second biasing member 814 biases the second case 812 clockwise relative to the first case 811 when viewed from the +Z direction. This second biasing member 814 prevents one of the first case 811 and the second case 812 from rattling relative to the other case. In this embodiment, the second biasing member 814 is configured as a tension coil spring. However, the second biasing member 814 is not limited to this, and may be configured as an elastic body or another spring member as long as the function of the second biasing member 814 described above can be realized.

[0052] [Function of the Manipulator Main Body] The function of the manipulator main body 4 will be described below with reference to the cross-sectional views of FIGS. 4 and 5 . As shown in FIGS. 4 and 5 , when the user rotates the operation knob 52 exposed to the outside of the housing 3 around the rotation axis Rx1 along the Z axis, the shaft portion 5 rotates in the same direction. Because the shaft 51 of the shaft portion 5 is inserted through the detection unit main body 62 of the detection unit 6, the rotation angle of the shaft portion 5 is detected by the detection unit main body 62. Meanwhile, the first case 811 of the pressing unit 81, into which the insertion portion 513 of the shaft 51 is inserted, rotates around the rotation axis Rx1 together with the shaft portion 5, causing the second case 812 to rotate in the same direction. When the second case 812 rotates, the first rotating body 82, which is connected to the connection surface 8129 of the second case 812 via the adhesive tape 85, rotates together with the second case 812 around the rotation axis Rx1 in the same direction as the second case 812.

[0053] Here, because the shaft portion 5 and the rotating member 71 of the rotary damper 7 are connected via the first rotating body 82 and the second rotating body 83, the load torque of the rotary damper 7, i.e., the rotational torque of the shaft portion 5, increases as the rotational speed of the shaft portion 5 increases. When the rotational torque of the shaft portion 5 corresponding to the rotational speed of the shaft portion 5 is equal to or less than the friction torque between the first rotating body 82 and the second rotating body 83, the rotation of the shaft portion 5 is transmitted to the rotary damper 7 via the first rotating body 82 and the second rotating body 83. More specifically, when the shaft portion 5 is rotated at a low speed, the first rotating body 82 rotates the second rotating body 83, which has a surface 83A that frictionally bonds with the surface 82B of the first rotating body 82, coaxially and in the same direction and at the same speed as the first rotating body 82. When the second rotating body 83 rotates, the holding member 84, which is adhered to the second rotating body 83 by the adhesive tape 86, rotates coaxially and in the same direction and at the same speed as the second rotating body 83. The rotating member 71 of the rotary damper 7 is connected to the holding member 84. Therefore, when the holding member 84 rotates, the rotation of the shaft portion 5 is transmitted to the rotating member 71, causing the rotating member 71 to rotate. A braking force acts on the rotation of the rotating member 71 due to the viscous resistance of the oil in the container 72, and the braking force of the rotary damper 7 acts on the rotation of the shaft portion 5. Therefore, in the low-speed rotation range where the rotational torque of the shaft portion 5 is equal to or less than the friction torque, the rotational load on the shaft portion 5 increases as the rotational speed of the shaft portion 5 increases.

[0054] On the other hand, when the rotational torque of the shaft portion 5 corresponding to the rotational speed of the shaft portion 5 is greater than the above-mentioned friction torque, the first rotating body 82 connected to the shaft portion 5 slips relative to the second rotating body 83 connected to the rotary damper 7. As a result, the rotation of the shaft portion 5 is less likely to be transmitted to the rotary damper 7 via the first rotating body 82 and the second rotating body 83. More specifically, when the shaft portion 5 is rotated at high speed, the surface 82B of the first rotating body 82 slips relative to the surface 83A of the second rotating body 83, so the first rotating body 82 cannot rotate the second rotating body 83 in the same direction and at the same speed as the first rotating body 82. In other words, the second rotating body 83 cannot follow the rotation of the first rotating body 82 and does not rotate integrally with the first rotating body 82. For this reason, the rotation of the shaft portion 5 is less likely to be transmitted to the rotating member 71, and because the rotating member 71 does not rotate at the same rotational speed as the shaft portion 5, the braking force of the rotation damper 7 is less likely to act on the rotation of the shaft portion 5. Therefore, in the high-speed rotation range where the rotational torque of the shaft portion 5 exceeds the above-mentioned friction torque, the rotational load on the shaft portion 5 is approximately constant regardless of the rotational speed of the shaft portion 5 and is smaller than when the shaft portion 5 and the rotational damper 7 are directly connected.

[0055] FIG. 12 is a graph showing the rotational speed and rotational load of the shank 5. As described above, in the low-speed rotation range R1 of the shank 5, the rotation of the shank 5 is transmitted to the rotational damper 7 via the rotation transmission mechanism 8. Therefore, as shown in FIG. 12, as the rotational speed of the shank 5 increases due to the user's rotational operation, the rotational load of the shank 5 increases. This allows the shank 5 to be rotated finely, allowing the rotation angle of the shank 5 to be finely adjusted. On the other hand, in the high-speed rotation range R2 of the shank 5, the first rotating body 82 slides relative to the second rotating body 83, thereby suppressing the transmission of the rotation of the shank 5 to the rotational damper 7. Therefore, even if the rotational speed of the shank 5 increases due to the user's rotational operation, the rotational load of the shank 5 remains approximately constant. This allows the shank 5 to rotate at a high speed and with a large magnitude. The rotational speed threshold of the shank 5 that separates the low-speed rotation range R1 and the high-speed rotation range R2 is set by the adjustment mechanism 9. This rotational speed threshold can be referred to as the first speed in the present invention.

[0056] [Configuration of Adjustment Mechanism] Figure 13 is a perspective view showing the adjustment mechanism 9 as viewed from the +Z direction. The adjustment mechanism 9 adjusts the pressing force of the pressing portion 81 against the first rotating body 82 to adjust the friction torque between the first rotating body 82 and the second rotating body 83, thereby adjusting the threshold rotational speed of the shaft portion 5 at which a switch is made between a case in which the rotation of the shaft portion 5 is transmitted to the rotary damper 7 via the rotation transmission mechanism 8 and a case in which the rotation is not easily transmitted to the rotary damper 7. That is, the adjustment mechanism 9 not only adjusts the friction torque between the first rotating body 82 and the second rotating body 83, but also adjusts the maximum value of the rotational load on the shaft portion 5 when the first rotating body 82 and the second rotating body 83 rotate integrally by frictional bonding. As shown in Figure 13, the adjustment mechanism 9 has a dial 91 and a cam member 92.

[0057] [Configuration of the Dial] The dial 91 is rotated by an adjuster, such as the manufacturer of the acoustic control device 1. The rotation axis Rx2 of the dial 91 is a rotation axis along the Z axis and is parallel to the rotation axis Rx1 of the shaft portion 5. The dial 91 has a shaft 911, an operating unit 912, and a transmission unit 913, and has a configuration in which the shaft 911, the operating unit 912, and the transmission unit 913 are integrated.

[0058] The shaft 911 is a cylindrical portion whose central axis is aligned with the Z axis. The shaft 911 is supported by the support portion 323 in a state in which the shaft 911 is inserted along the Z axis through a hole 324 (see FIG. 6 ) of the support portion 323 of the housing 3. The operating unit 912 is provided at the end of the shaft 911 in the +Z direction and is disposed in the +Z direction with respect to a top surface portion 321 (see FIG. 6 ) of the holding member 32 of the housing 3. The operating unit 912 has an outer diameter larger than that of the shaft 911. When the adjuster rotates the operating unit 912, the dial 91 rotates around the rotation axis Rx2. The transmission unit 913 is a pinion gear provided at the end of the shaft 911 in the -Z direction. That is, the transmission unit 913 is a gear having a plurality of teeth arranged circumferentially around the rotation axis Rx2. The transmission portion 913 meshes with the cam member 92 , so that when the dial 91 is rotated, the cam member 92 rotates in the direction opposite to the direction in which the dial 91 rotates.

[0059] [Configuration of Cam Member] The cam member 92 engages with the dial 91. Specifically, the cam member 92 meshes with the transmission portion 913 of the dial 91. The cam member 92 is rotated by the rotational force of the dial 91 and presses the first rotating body 82 and the second rotating body 83 toward the pressing portion 81. More specifically, the cam member 92 moves the first rotating body 82, the second rotating body 83, the holding member 84, and the rotary damper 7, which are arranged between the pressing portion 81 and the cam member 92, in the ±Z directions, thereby pressing the first rotating body 82 toward the pressing portion 81. This adjusts the pressing force of the pressing portion 81 against the first rotating body 82. The cam member 92 is formed in a disk shape when viewed from the +Z direction, and is disposed on the base 31 of the housing 3 so as to be rotatable about the rotation axis Rx1. The cam member 92 has an insertion opening 921, an opening 922, a meshing portion 923, and an end surface cam portion 924.

[0060] The insertion hole 921 is located in the center of the cam member 92 when viewed from the +Z direction, and penetrates the cam member 92 along the Z axis. A boss 314 provided on the base 31 is inserted into the insertion hole 921 from the -Z direction. This allows the cam member 92 to be rotatably supported on the base 31. The opening 922 is formed in an arc shape on the outer circumferential side of the cam member 92 relative to the insertion hole 921. The opening 922 is an opening for avoiding the boss 727 provided on the rotary damper 7 and inserted into the hole 316 of the base 31. The meshing portion 923 is located on the outer circumferential surface of the cam member 92 at a position facing the -X direction. The meshing portion 923 has a plurality of teeth provided along the outer circumferential surface of the cam member 92, and the plurality of teeth mesh with the transmission portion 913 of the dial 91. That is, the cam member 92 meshes with the transmission part 913 of the dial 91 at the meshing part 923, and rotates around the rotation axis Rx1 in response to the rotation operation of the dial 91.

[0061] The end surface cam portion 924 is provided on a surface 925 of the cam member 92 that faces the +Z direction. In other words, the end surface cam portion 924 is provided on a surface 925 of the cam member 92 that faces the rotary damper 7. The end surface cam portion 924 is formed along the circumferential direction about the rotation axis Rx1 and so that the amount of protrusion from the surface 925 increases as it moves clockwise as viewed from the +Z direction. The end surface cam portion 924 is inserted into a groove portion 728 of the rotary damper 7 (see FIG. 9 ) from the −Z direction, and moves the rotary damper 7 in the ±Z directions as the cam member 92 rotates.

[0062] More specifically, the end surface cam portion 924 is composed of three cam portions 9241, 9242, and 9243 that are equally spaced circumferentially about the rotation axis Rx1. Each of the cam portions 9241 to 9243 has an arc shape that extends along the circumferential direction about the rotation axis Rx1, and is formed so that the amount of protrusion from the surface 925 increases as the rotation proceeds clockwise as viewed from the +Z direction. Each of the cam portions 9241 to 9243 is inserted into a corresponding one of the regions 7281 to 7283 of the groove portion 728. As the cam member 92 rotates, each of the cam portions 9241 to 9243 moves the rotary damper 7 in the ±Z directions, thereby moving the first rotary body 82, the second rotary body 83, the holding member 84, and the rotary damper 7 in directions toward and away from the pressing portion 81.

[0063] FIG. 14 is a graph showing the relationship between the rotational speed of the shaft portion 5 and the rotational load of the shaft portion 5. Note that the graph shown in FIG. 14 is a graph showing a state adjusted by the adjustment mechanism 9. As the dial 91 rotates, the cam member 92 rotates in the opposite direction to the dial 91, causing the first rotor 82, the second rotor 83, the holding member 84, and the rotary damper 7 to move in the +Z direction or the −Z direction. This changes the pressing force of the pressing portion 81 on the first rotor 82, and changes the friction torque between the first rotor 82 and the second rotor 83. For example, when the dial 91 is rotated clockwise as viewed from the +Z direction, the cam member 92 rotates counterclockwise. In this case, the cam member 92 moves the rotary damper 7 in the +Z direction, contracting the first biasing member 813. This increases the pressing force of the pressing portion 81 on the first rotor 82 and increasing the friction torque. In this case, the second rotating body 83 becomes more likely to rotate following the rotation of the first rotating body 82, and the maximum value of the rotational load on the shaft 5 increases from a value T0 before the dial 91 is operated to a value T1, as shown by the dashed-dotted line in Figure 14. In other words, the threshold value of the rotational speed of the shaft 5 when the rotation transmission mechanism 8 transmits the rotation of the shaft 5 to the rotation damper 7 increases from a value S0 before the dial 91 is operated to a value S1.

[0064] On the other hand, when the dial 91 is rotated counterclockwise as viewed from the +Z direction, the cam member 92 rotates clockwise. In this case, the cam member 92 moves the rotary damper 7 in the -Z direction, causing the first biasing member 813 to extend, reducing the pressing force of the pressing portion 81 against the first rotating body 82 and reducing the friction torque. In this case, the second rotating body 83 becomes less likely to rotate following the rotation of the first rotating body 82, and as shown by the two-dot chain line in FIG. 14 , the maximum value of the rotational load on the shaft portion 5 decreases from a value T0 before the dial 91 was operated to a value T2. In other words, the threshold value of the rotational speed of the shaft portion 5 when the rotation transmission mechanism 8 transmits the rotation of the shaft portion 5 to the rotary damper 7 decreases from a value S0 before the dial 91 was operated to a value S2.

[0065] In this way, by rotating the dial 91, it is possible to adjust the threshold value of the rotational speed of the shaft 5 when the rotation transmission mechanism 8 transmits the rotation of the shaft 5 to the rotation damper 7, and therefore to adjust the maximum value of the rotational load on the shaft 5. Therefore, it is possible to increase the versatility of the rotary operator 2 and also to improve usability for the user.

[0066] As shown in FIGS. 2 and 3 , a locking member RM that engages with the transmission unit 913 of the dial 91 to lock the rotation of the dial 91 can be attached to the base 31 of the housing 3 with a screw SC6. The locking member RM restricts the rotation of the dial 91 after adjustment, thereby preventing the above-mentioned threshold rotational speed of the shaft 5 and the maximum rotational load of the shaft 5 from being unintentionally changed. One example of a case in which such a locking member RM is attached is when the manufacturer of the acoustic control device 1 adjusts the rotational load using the adjustment mechanism 9 before shipping the acoustic control device 1. On the other hand, if the acoustic control device 1 is configured to allow the user to rotate the dial 91, the locking member RM is not provided on the base 31. Furthermore, if the locking member RM is not provided, the first rotating body 82 and the second rotating body 83 may be spaced apart from each other along the Z axis when the rotary damper 7 is moved in the −Z direction by the cam member 92. In this case, the rotational load on the shaft portion 5 is minimized regardless of the rotational speed of the shaft portion 5, so the adjustment range of the rotational load on the shaft portion 5 can be expanded, and the versatility of the rotary operator 2 can be further increased.

[0067] [Effects of First Embodiment] The acoustic control device 1 according to the present embodiment described above provides the following effects. The acoustic control device 1 includes a rotary operator 2. The rotary operator 2 includes a shaft 5, a first rotating body 82, a second rotating body 83, a rotary damper 7, and a pressing unit 81. The shaft 5 is rotated by a user about the rotation axis Rx1. The first rotating body 82 rotates together with the shaft 5. The second rotating body 83 has a surface 83A that comes into surface contact with a surface 82B of the first rotating body 82. The surface 82B corresponds to the first surface, and the surface 83A corresponds to the second surface. The rotary damper 7 is connected to the second rotating body 83. The pressing unit 81 presses the first rotating body 82 against the second rotating body 83.

[0068] With this configuration, the first rotating body 82 rotates together with the shaft portion 5. At this time, the first rotating body 82 is pressed toward the second rotating body 83 by the pressing portion 81. Therefore, when the shaft portion 5 rotates at a low speed, the second rotating body 83, which has the surface 83A frictionally joined to the surface 82B, rotates integrally with the first rotating body 82. Because the second rotating body 83 is connected to the rotary damper 7, the rotation of the second rotating body 83, i.e., the rotation of the shaft portion 5, is transmitted to the rotary damper 7 and damped. Therefore, when the shaft portion 5 rotates at a low speed, the rotational load on the shaft portion 5 can be increased. On the other hand, when the shaft portion 5 rotates at a high speed, the surface 82B slides relative to the surface 83A, making it difficult for the rotation of the first rotating body 82 to be transmitted to the second rotating body 83 and, ultimately, to the rotary damper 7. In this case, even when the rotational speed of the shaft portion 5 increases, the rotational load on the shaft portion 5 remains substantially constant. That is, when the shaft portion 5 is rotated at high speed, the rotational load on the shaft portion 5 can be reduced compared to a configuration in which the shaft portion 5 is directly connected to the rotary damper 7. In this way, the rotational load on the shaft portion 5 can be changed according to the rotational speed of the shaft portion 5. As a result, when the shaft portion 5 is rotated finely, the shaft portion 5 can be rotated with a high rotational load, and when the shaft portion 5 is rotated at high speed, the shaft portion 5 can be rotated with a substantially constant rotational load. Therefore, the rotational operation of the shaft portion 5 can be easily performed, and the rotary operator 2 can be easily operated according to the application or operating state.

[0069] In the rotary operator 2, when the rotational speed of the shaft 5 is less than the threshold value, the first rotating body 82 and the second rotating body 83 rotate integrally. When the rotational speed of the shaft 5 is equal to or greater than the threshold value, the surface 82B of the first rotating body 82 slides relative to the surface 83A of the second rotating body 83. With this configuration, when the rotational speed of the shaft 5 is less than the threshold value, almost all of the rotation of the shaft 5 is transmitted to the rotary damper 7, thereby increasing the rotational load on the shaft 5. This allows the shaft 5 to be rotated finely, allowing for fine adjustment of the rotation angle of the shaft 5. On the other hand, when the rotational speed of the shaft 5 is equal to or greater than the threshold value, transmission of the rotation of the shaft 5 to the rotary damper 7 is suppressed, making it difficult for the braking force of the rotary damper 7 to act on the rotation of the shaft 5. This reduces the rotational load on the shaft 5 compared to when the shaft 5 and the rotary damper 7 are directly connected, making it easier to rotate the shaft 5 at high speeds.

[0070] The rotary operator 2 is equipped with an adjustment mechanism 9 that changes the threshold value. With this configuration, the threshold value for the rotational speed of the shaft 5 when rotation of the shaft 5 can be transmitted to the rotary damper 7 can be changed depending on the application of the rotary operator 2 and the preferences of the operator of the rotary operator 2. This improves the versatility and operability of the rotary operator 2.

[0071] In the rotary operator 2, the adjustment mechanism 9 has a dial 91 and a cam member 92. The dial 91 is rotated by the above-mentioned adjuster. The cam member 92 is rotated by the rotational force of the dial 91. The cam member 92 presses the first rotating body 82 and the second rotating body 83 toward the pressing portion 81. With this configuration, the adjustment mechanism 9 can be configured with a relatively simple structure. In addition, since the above-mentioned threshold value can be changed simply by rotating the dial 91, the operation to change the threshold value can be easily performed.

[0072] In the rotary operator 2, the cam member 92 rotates about the rotation axis Rx1 due to the rotational force of the dial 91, and presses the first rotary body 82, the second rotary body 83, and the rotary damper 7 toward the pressing portion 81. With this configuration, the direction of the pressing force by the pressing portion 81 and the direction of the pressing force by the cam member 92 are opposite to each other, so even if the cam member 92 presses the first rotary body 82, the second rotary body 83, and the rotary damper 7 only slightly, the pressing force by the pressing portion 81 can be increased. In addition, the pressing portion 81, the first rotary body 82, the second rotary body 83, the rotary damper 7, and the cam member 92 can be closely arranged, allowing the rotary operator 2 to be configured compactly.

[0073] In the rotary operator 2, the surface 82B and the surface 83A are perpendicular to the rotation axis Rx1. The pressing portion 81 presses the first rotating body 82 toward the second rotating body 83 along the rotation axis Rx1. With this configuration, the pressing force of the pressing portion 81 can easily bring the surface 82B and the surface 83A into close contact with each other. Therefore, when the shaft portion 5 rotates at a low speed, the rotation of the first rotating body 82 can be easily transmitted to the second rotating body 83.

[0074] In the rotary operator 2, the pressing portion 81 has a plurality of first biasing members 813 arranged in the circumferential direction about the rotation axis Rx1. The first biasing members 813 correspond to the biasing members of the present invention. With this configuration, a pressing force can be uniformly applied to the first rotating body 82 in the circumferential direction about the rotation axis Rx1. This makes it easier to bring the first rotating body 82 and the second rotating body 83 into close contact with each other, and makes it easier to transmit the rotation of the shaft portion 5 to the second rotating body 83 and, ultimately, to the rotary damper 7.

[0075] In the rotary operator 2, the first rotary body 82 and the pressing portion 81 are integrated. With this configuration, an increase in the number of parts of the rotary operator 2 can be suppressed, and the configuration of the rotary operator 2 can be simplified.

[0076] Second Embodiment Next, a second embodiment of the present invention will be described. The acoustic control device according to this embodiment has a configuration similar to that of the acoustic control device 1 according to the first embodiment, but differs in that a rotary operator similar to the rotary operator 2 according to the first embodiment is used for the crossfader. In the following description, parts that are the same or substantially the same as parts already described will be assigned the same reference numerals and description thereof will be omitted.

[0077] [General configuration of the sound control device] Fig. 15 is a schematic diagram showing the crossfader 14 provided in the sound control device according to this embodiment. The sound control device according to this embodiment has the same configuration and functions as the sound control device 1 according to the first embodiment, except that it is provided with the crossfader 14 shown in Fig. 15 instead of the crossfader 13. The crossfader 14 includes a slider 141 and a rotary operator 2A, and has the same functions as the crossfader 14 according to the first embodiment.

[0078] [Configuration of the slider] The slider 141 is provided so as to be slidable in the left-right direction of the sound control device. The slider 141 has an operation knob 142 and a rack 143. The operation knob 142 is exposed on the top surface 112 of the sound control device and is gripped by the user. When the operation knob 142 is slid left-right, the slider 141 is slid in the same direction. The rack 143 is provided on the side surface of the slider 141 facing the rotary operator 2A. The rack 143 has a plurality of teeth aligned in the sliding direction of the slider 141. The rack 143 meshes with the pinion 54 of the rotary operator 2A, causing the pinion 54, and therefore the shaft 51, to rotate about the rotation axis Rx1.

[0079] [Configuration of Rotary Operator] The rotary operator 2A has the same configuration and function as the rotary operator 2 according to the first embodiment, except that it includes a shaft 5A instead of the shaft 5. The shaft 5A has the same configuration and function as the shaft 5, except that it includes a pinion 54 instead of the operation knob 52. That is, the shaft 5A includes a shaft 51 and a pinion 54. The pinion 54 is fixed to the end of the shaft 51 in the +Z direction, and rotates integrally with the shaft 51 about the rotation axis Rx1. The pinion 54 has a plurality of teeth 541 provided on the outer periphery of the pinion 54 centered on the rotation axis Rx1. The pinion 54 meshes with the rack 143 at the plurality of teeth 541, and rotates together with the shaft 51 about the rotation axis Rx1 in response to the sliding of the slider 141.

[0080] Therefore, when the slider 141 is slid within a range in which the rotational speed of the shaft 5A is less than the above-mentioned maximum value, the rotation of the shaft 5A is transmitted to the rotary damper 7, and the braking force of the rotary damper 7 can be applied to the sliding of the slider 141. As a result, a load is applied to the sliding of the slider 141, making it easier to fine-tune the position of the slider 141. On the other hand, when the slider 141 is slid within a range in which the rotational speed of the shaft 5A is equal to or greater than the above-mentioned maximum rotational speed, the rotation of the shaft 5A is not transmitted to the rotary damper 7, and the braking force of the rotary damper 7 is not applied to the sliding of the slider 141. As a result, no load is applied to the sliding of the slider 141, and it is therefore possible to easily slide the slider 141 at high speed.

[0081] The sound control device according to this embodiment described above can achieve the same effects as the sound control device 1 according to the first embodiment. Similar to the crossfader 14, a configuration including a slider 141 and a rotary operator 2A may be employed for the channel fader 123 or the tempo slider 124.

[0082] [Modifications of the Embodiments] The present invention is not limited to the above-described embodiments, and modifications and improvements within the scope of achieving the object of the present disclosure are included in the present disclosure. In the above-described embodiments, the first rotating body 82 and the pressing portion 81 that presses the first rotating body 82 toward the second rotating body 83 are adhered to each other with adhesive tape 85. However, this is not limited to this, and the first rotating body 82 may be at least a part of the pressing portion 81. That is, when the pressing portion 81 rotates together with the shaft portion 5, a part of the pressing portion 81 may function as the first rotating body 82, and the surface of the pressing portion 81 that faces the surface 83A of the second rotating body 83 may be in surface contact with the surface 83A. In this case, the surface of the pressing portion 81 that faces the surface 83A corresponds to the first surface.

[0083] On the other hand, the pressing unit 81 does not need to rotate integrally with the shaft unit 5 as long as it can press the first rotating body 82, which serves as the first rotating body, toward the second rotating body 83. In this case, the pressing unit may be configured to include, for example, a roller that presses the first rotating body 82 and has a rotation axis that is perpendicular to the rotation axis Rx1.

[0084] In each of the above embodiments, the rotation transmission mechanism 8 has the first rotating body 82 and the second rotating body 83, and the surface 82B serving as a first surface orthogonal to the rotation axis Rx1 of the first rotating body 82 and the surface 83A serving as a second surface orthogonal to the rotation axis Rx1 and facing the surface 82B of the second rotating body 83 are frictionally joined. However, this is not limiting, and the outer circumferential surfaces of the first rotating body 82 and the second rotating body 83 may be frictionally joined. In this case, the pressing unit 81 may apply a pressing force to one of the first rotating body 82 and the second rotating body 83 toward the other rotating body.

[0085] In the above embodiments, the pressing portion 81 includes a plurality of first biasing members 813 arranged at equal intervals along the circumferential direction centered on the rotation axis Rx1, and the plurality of first biasing members 813 press the second case 812 against the first rotating body 82. However, this is not limiting, and instead of the plurality of first biasing members 813, a ring-shaped elastic body extending along the circumferential direction centered on the rotation axis Rx1 may be used. Furthermore, the number of first biasing members 813 can be changed as appropriate.

[0086] In each of the above embodiments, the rotary operator 2 is provided with the adjustment mechanism 9 that changes the maximum value of the rotation speed described above as the first speed. However, this is not a limitation, and the adjustment mechanism 9 may be omitted. Furthermore, the adjustment mechanism 9 is provided with a dial 91 and a cam member 92. However, this is not a limitation, and the configuration of the adjustment mechanism 9 is not limited to the above configuration as long as it adjusts the pressing force of the pressing portion 81. Furthermore, the cam member 92 moves the first rotating body 82, the second rotating body 83, and the rotary damper 7 in a direction toward and away from the dial 91. However, this is not a limitation, and the cam member 92 may move the pressing portion 81 in a direction toward and away from the first rotating body 82.

[0087] In the above-described embodiments, the rotary operators 2, 2A are employed in the acoustic control device 1. However, the present invention is not limited to this, and the rotary operators of the present invention may be employed in other electronic devices.

[0088] [Disclosure of the Invention] The disclosure of the present invention is as follows: [1] A rotary operator comprising: a shaft portion that rotates about a rotation axis, a first rotating body that rotates together with the shaft portion, a second rotating body having a second surface that is in surface contact with a first surface of the first rotating body, a rotary damper that is connected to the second rotating body, and a pressing portion that presses the first rotating body against the second rotating body.

[0089] With this configuration, the first rotor rotates together with the shaft. At this time, the first rotor is pressed toward the second rotor by the pressing portion. Therefore, when the shaft rotates at a low speed, the second rotor, which has a second surface frictionally bonded to the first surface, rotates integrally with the first rotor. Because the second rotor is connected to the rotary damper, the rotation of the second rotor, i.e., the rotation of the shaft, is transmitted to and damped by the rotary damper. Therefore, when the shaft rotates at a low speed, the rotational load on the shaft can be increased.

[0090] On the other hand, when the shaft portion rotates at high speed, the first surface slides relative to the second surface, making it difficult for the rotation of the first rotating body to be transmitted to the second rotating body and, ultimately, the rotary damper. In this case, even when the rotational speed of the shaft portion increases, the rotational load on the shaft portion remains substantially constant. That is, when the shaft portion rotates at high speed, the rotational load on the shaft portion can be reduced compared to a configuration in which the shaft portion is directly connected to the rotary damper. In this way, the rotational load on the shaft portion can be changed depending on the rotational speed of the shaft portion. As a result, when the shaft portion is rotated finely, the shaft portion can be rotated with a high rotational load, and when the shaft portion is rotated at high speed, the shaft portion can be rotated with a substantially constant rotational load. This makes it easier to rotate the shaft portion and to operate the rotary operator depending on the application or operating state.

[0091] [2] The rotary operator described in [1], wherein the first rotating body and the second rotating body rotate integrally when the rotational speed of the shaft is below a threshold value, and the first surface slides relative to the second surface when the rotational speed of the shaft is equal to or greater than the threshold value. With this configuration, when the rotational speed of the shaft is below the threshold value, the first rotating body transmits almost all of the rotation of the shaft to the rotary damper, thereby increasing the rotational load on the shaft. This allows the shaft to be rotated finely, allowing for fine adjustment of the rotation angle of the shaft. On the other hand, when the rotational speed of the shaft is equal to or greater than the threshold value, the first rotating body suppresses transmission of the rotation of the shaft to the rotary damper, thereby making it difficult for the braking force of the rotary damper to act on the rotation of the shaft. This reduces the rotational load on the shaft compared to when the shaft and the rotary damper are directly connected, making it easier to rotate the shaft at high speeds.

[0092] [3] The rotary operator according to [2], further comprising an adjustment mechanism for changing the threshold value. With this configuration, the threshold value can be changed depending on the application of the rotary operator and the preferences of the operator of the rotary operator. This improves the versatility and operability of the rotary operator.

[0093] [4] The rotary operator described in [3], wherein the adjustment mechanism includes a dial that is rotated, and a cam member that is rotated by the rotational force of the dial and presses the first rotating body and the second rotating body toward the pressing portion. This configuration allows the adjustment mechanism to be configured with a relatively simple structure. Furthermore, since the threshold value can be changed simply by rotating the dial, the threshold value can be easily changed.

[0094] [5] The rotary operator described in [4], wherein the cam member rotates about the rotation axis due to the rotational force of the dial, pressing the first rotor, the second rotor, and the rotary damper toward the pressing portion. With this configuration, the pressing force of the pressing portion and the pressing force of the cam member are opposite to each other, so even if the cam member presses the first rotor, the second rotor, and the rotary damper only slightly, the pressing force of the pressing portion can be increased. Furthermore, the pressing portion, the first rotor, the second rotor, the rotary damper, and the cam member can be closely arranged, allowing the rotary operator to be configured compactly.

[0095] [6] The rotary operator described in any one of [1] to [5], wherein the first surface and the second surface are perpendicular to the rotation axis, and the pressing portion presses the first rotating body toward the second rotating body along the rotation axis. With this configuration, the pressing force of the pressing portion can easily bring the first surface and the second surface into close contact with each other. Therefore, when the shaft portion rotates at a low speed, the rotation of the first rotating body can be easily transmitted to the second rotating body.

[0096] [7] The rotary operator according to any one of [1] to [6], wherein the pressing portion has a plurality of biasing members arranged in a circumferential direction about the rotation axis. With this configuration, a pressing force can be uniformly applied to the first rotating body in the circumferential direction about the rotation axis. This makes it easier to bring the first rotating body and the second rotating body into close contact with each other, and makes it easier to transmit the rotation of the shaft portion to the second rotating body and, ultimately, to the rotary damper.

[0097] [8] The rotary operator according to any one of [1] to [7], wherein the first rotor and the pressing portion are integrated. This configuration can prevent an increase in the number of parts of the rotary operator, thereby simplifying the configuration of the rotary operator.

[0098] [9] An acoustic control device comprising the rotary operator according to any one of [1] to [8]. With this configuration, it is possible to achieve the same effects as the rotary operator described above.

[0099] 1...acoustic control device, 2, 2A...rotary operator, 3...housing, 4...operator main body, 5...shaft portion, 51...shaft, 52...operation knob, 6...detection portion, 7...rotary damper, 8...rotation transmission mechanism, 81...pressure portion, 811...first case, 812...second case, 813...first biasing member (biasing member), 814...second biasing member, 82...first rotating body, 82B...surface (first surface), 83...second rotating body, 83A...surface (second surface), 84...holding member, 9...adjustment mechanism, 91...dial, 92...cam member, Rx1...rotational axis.

Claims

1. A rotary operator, a shaft portion that rotates around a rotation axis; a first rotor that rotates together with the shaft portion; a second rotating body having a second surface that is in surface contact with the first surface of the first rotating body; a rotary damper connected to the second rotating body; a pressing portion that presses the first rotating body against the second rotating body.

2. 2. The rotary operator according to claim 1, When the rotation speed of the shaft portion is less than a threshold value, the first rotating body and the second rotating body rotate integrally, A rotary operator, characterized in that, when the rotation speed of the shaft portion is equal to or greater than the threshold value, the first surface slides relative to the second surface.

3. 3. The rotary operator according to claim 2, A rotary operator comprising an adjustment mechanism for changing the threshold value.

4. 4. The rotary operator according to claim 3, The adjustment mechanism includes: A dial that is rotated; a cam member that is rotated by the rotational force of the dial and presses the first rotating body and the second rotating body toward the pressing portion.

5. 5. The rotary operator according to claim 4, A rotary operator characterized in that the cam member rotates around the rotation axis due to the rotational force of the dial, and presses the first rotating body, the second rotating body, and the rotary damper toward the pressing portion.

6. The rotary operator according to any one of claims 1 to 5, the first surface and the second surface are perpendicular to the rotation axis, The rotary operator, wherein the pressing portion presses the first rotating body toward the second rotating body along the rotation axis.

7. The rotary operator according to any one of claims 1 to 5, The rotary operator, wherein the pressing portion has a plurality of biasing members arranged in a circumferential direction around the rotation axis.

8. The rotary operator according to any one of claims 1 to 5, A rotary operator, wherein the first rotor and the pressing portion are integrated.

9. An acoustic control device comprising the rotary operator according to any one of claims 1 to 5.